{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["else", "alternate names", "cities of residence", "city of headquarters"], "input": "Returning to Canada Thomson worked for a short time at the National Film Board of Canada before being invited to served as Associate Private  Secretary  to Canadian Prime Minister  Louis St. Laurent  where he remained until 1958 ."}
{"else": [], "alternate names": [], "cities of residence": [], "city of headquarters": []}